O epiphyseal growth plates in long bones 2 elastic

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oEpiphyseal (growth) plates in long bones2.Elastic cartilage (not pictured)oProvides elasticityoLocation: supports the external ear3.FibrocartilageoHighly compressibleoLocation: forms cushion like discs between vertebraeof the spinal columnDense connective tissue (dense fibrous tissue)Main matrix element is collagen fiberFibroblasts are cells that make fibersLocationsoTendons - attach skeletal muscle to boneoLigaments - attach bone to bone at joints and aremore elastic than tendonsoDermis - lower layers of the skinLoose connective tissueSofter, have more cells and fewer fibers than otherconnective tissues (except blood)TypesoAreolaroAdiposeoReticularAreolar connective tissueMost widely distributed connective tissueSoft, pliable tissue like “cobwebs”Functions as a universal packing tissue and “glue” to holdorgans in placeLayer of areolar tissue calledlaminapropriaunderlies allmembranesAll fiber types form a loose networkCan soak up excess fluid (causes edema)Adipose connective tissueAn areolar tissue in which adipose (fat) cells dominateFunctionsoInsulates the bodyoProtects some organsoServes as a site of fuel storageLocationsSubcutaneous tissue beneath the skinProtects organs, such as the kidneysFat “depots” include hips, breasts, and bellyReticular connective tissueDelicate network of interwoven fibers with reticular cells(like fibroblasts)Forms stroma (internal framework) of organsLocationsoLymph nodesoSpleenBone marrowBlood (vascular tissue)Blood cells surrounded by fluid matrix known asbloodplasmaSoluble fibers are visible only during clottingFunctions as the transport vehicle for the cardiovascularsystem, carrying:oNutrientsoWastesoRespiratory gasesMuscle TissueFunction is to contract, or shorten, to produce movementThree types of muscle tissue:1.Skeletal2.Cardiac3.SmoothSkeletal Muscle TissuePackaged by connective tissue sheets into skeletal muscles,which are attached to the skeleton and pull on bones or skinVoluntarily (consciously) controlledProduces gross body movements or facial expressionsCharacteristics of skeletal muscle cellsoStriations (stripes)oMultinucleate (more than one nucleus)oLong, cylindrical shapeCardiac Muscle TissueInvoluntarily controlledFound only in the heartPumps blood through blood vesselsCharacteristics of cardiac muscle cellsoStriationsoOne nucleus per celloShort, branching cellsoIntercalated discs contain gap junctions toconnect cells togetherSmooth (visceral) Muscle TissueInvoluntarily controlledFound in walls of hollow organs such as stomach, uterus,and blood vesselsPeristalsis, a wavelike activity, is a typical activityCharacteristics of smooth muscle cellsoNo visible striationsoOne nucleus per celloSpindle-shaped cellsNervous TissueFunction is to receive and conduct electrochemical impulsesto and from body partsoIrritabilityoConductivityComposed of neurons and nerve support cellsoSupport cells calledneurogliainsulate, protect,and support neuronsSummary of TissueIt summarizes the tissue types and functions in the bodyAlso, the major functions, characteristics, and body locationsof the four tissue types: epithelial, connective, muscle, andnervous tissues.

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